There are many kinds of proteins Hemoglobin, a transport prote Structural proteins are foun is the component of blood that in skin, hair, and bones takes the oxygen we breathe to our cells Contractile proteins in muscles allow us to move Some proteins are hormones that regulate body metabolism Storage proteins serve as a White blood cells produce antibodies Enzymes are proteins that which are proteins that hght infections. act as catalysts for reactions source of amino acids in milk he body, including the digestion of food Figure 13.18 The variety of proteins in the human body
There are many kinds of proteins
The Four Levels of Protein Structure Protein structure The amino o represents the side chain of the acid monomer amino acid and is different on each of the 20 amino acids is determined by Pol attractions strand Primary between structure neighboring a helix B-Pleated sheet amino acids Secondary structur Hydrogen bond ry Disulfide bond structure Quaternary R structure R
Protein structure is determined by attractions between neighboring amino acids